From what I've seen of the coat I generally like it but I do have one small in that it appears to be leather and one of the VK questions in the first movie centered around a calfskin wallet in order to elicit a reaction to the leather. Just seemed contradictory to me but I don't know I could just be thinking about it too much.

According to a whole lot of people (RPF) who had the chance to take pics of the costume, the boots are an 8".
As for the marking/letters/paint at the back of the coat: go to the NECA page and see the K's figure to clearly see them